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Appreciation towards idArchitekt.innen and Aetal for providing the following description:

该商业大楼建于1978年，位于苏黎世湖畔的Zollikon市。它的西边是Seestrasse车站，东侧是铁轨。该建筑的历史可追溯至1970年代后期，目前设计师正在对其翻新，并在整体建筑体量上增加了一层。此外，作为翻新工程的一部分，大楼内的两层楼将被改建为幼儿园。

The commercial building, constructed in 1978, is located in the municipality of Zollikon on the shore of Lake Zurich. It is flanked by the Seestrasse to the west and the railway tracks to the east. The building, which dates from the late 1970s, is being renovated and a full storey added to the overall volume. In addition, two storeys inside the building will be converted into a kindergarten as part of the renovation.

▼建筑外观，overview of the exterior © Markus Bertschi Fotografie

扩建部分主要参考了现有建筑的构造——其建筑节奏一直延续至新增的阁楼层。窗户开口的高度、材料从混凝土到钢材的变化等等设计手法呼应了现有建筑主体。设计成果是一个典型建筑空间，主要划分为基础部分、主体和阁楼层。在西侧，建筑围护结构从主体结构中分离出来，并为宽敞的露台创造了空间，通过建筑退台可以看到湖景。

The extension makes strong reference to the tectonics of the existing building – its rhythm is continued in the attic storey. The elevation of the window openings and the change of material from concrete to steel form a clear conclusion to the existing main body. The result is a characteristic division into base, main and attic volumes. In the west, the building envelope detaches itself from the primary structure and creates space for a ge- nerous terrace with a view of the lake via setback.

▼建筑外观正立面，front view of the exterior © Markus Bertschi Fotografie

▼由停车场看向建筑，a view from the car park to the building © Markus Bertschi Fotografie

为与现有建筑的结构理念保持一致，扩建部分的竖向荷载传递遵循与原始建筑相同的结构原理，采用具有分散荷载的预制混凝土立面、承重核心筒和在其间自由跨越的楼板。包含棚状结构在内的钢木混合结构的扩建跨越整个平面，从而保证不会将荷载转移到现有楼板上。

In keeping with the structural concept of the exis- ting building, with its load-dissipating prefabrica- ted concrete façade, the load-bearing core and the floor slabs spanning freely in between, the vertical load transfer of the extension follows the same structural principle. The extension in steel-wood hybrid construction spans the entire floor plan, in- cluding the pergola structure, and thus guarantees that no loads are transferred to the existing floor slab.

▼跨越整个空间的钢木混合结构，the steel-wood hybrid construction spans the entire floor plan © Markus Bertschi Fotografie

现有楼层的天花板和核心墙将被升级。混凝土天花板暴露在视野内，而核心墙则覆盖着黑色中密度纤维板。楼层中央的深色覆层与立面内侧的浅色沙色覆层形成鲜明对比。它带来了一种平衡感，并通过其声学穿孔整合了空间协调一致的体验感。

The ceilings and core walls on the existing floors will be upgraded. The concrete ceilings are left visible, whereas the core walls are clad with black mdf. The dark cladding in the centre of the free floor plan is contrasted with the light, sand-colou- red cladding on the inside of the façade. It provides a counterbalance and also makes an important contribution to a concerted feeling of space with its acoustic perforation.

▼协调统一的空间，a concerted feeling of space © Markus Bertschi Fotografie

▼由吧台看向主空间，a view from the bar to the main space © Markus Bertschi Fotografie

就幼儿园的扩建一样，阁楼楼层的改造平面扩建是基于现有建筑的结构原则。核心交通空间在室内得到扩展。一方面，设计采用直接相邻的房间的形式，或者在空间平整的情况下，通过丙烯酸石材的室内台阶，将独立房间连接到空间核心。

Just like the extension of the kindergarten, the retrofitted flat expansion on the attic floor is based on the principles of the existing building. The access core is extended in terms of space. On the one hand, this takes the form of directly adjoining rooms or – in the case of the flat – by means of free-standing wet rooms, which are connected to the core in the centre via a built-up topography of acrylic stone.

▼丙烯酸石材室内台阶，a built-up topography of acrylic stone © Markus Bertschi Fotografie

可180°打开的房间高平开门和推拉门可实现各种房间组合，以满足日常生活的不同需求。例如，可以关闭面向立面的侧室，以形成紧凑的房间，或将开放式空间分区。

Room-high swing and sliding doors that can be opened 180° allow various room confi- gurations to meet the different needs of everyday life. For example, the side rooms open to the faça- de can be closed off to form compact chambers that zone the open floor plan.

▼可移动的推拉门创造不同的空间类型，sliding doors creates different spaces © Markus Bertschi Fotografie

▼可移动的推拉门创造不同的空间类型，sliding doors creates different spaces © Markus Bertschi Fotografie

沿着建筑立面和核心，本项目创造了一个流动的空间，允许“自由计划”的特征在其广阔的空间中继续给用户带来独特体验。

Along the façade and the core, a flowing space is created that allows the characteristics of the „plan libre“ to continue to be experienced spatially in its generosity.

▼一层轴测图，axonometric drawing of the ground floor ©idArchitekt.innen and Aetal

▼二层轴测图，axonometric drawing of the first floor © Markus Bertschi Fotografie

▼顶层轴测图，axonometric drawing of the top floor © idArchitekt.innen and Aetal

▼立面图，elevation © idArchitekt.innen and Aetal

Object: ZAW . Conversion + extension of commercial building
Year:2018-2020 . Renovation + extension of kindergarten
2018-2021 . Addition of attic
2021-2022 . Extension of flat
Typ: Conversion + extension, commercial, kindergarten + residential
Location: Zollikon, ZH Switzerland

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